Cabinet knob



FIG. 1 is a perspective view of the cabinet knob showing my new design;

FIG. 2 is a reduced front elevational view thereof;

FIG. 3 is a back elevational view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a top view thereof.

The broken line showing of the circular element in FIG. 5 forms no part of the claimed design. 

The ornamental design for a cabinet knob, as shown and described. 